Red Hat GLOBAL FILE SYSTEM 4.7, Manual

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a slowdown in performance.
As a user or group approaches their quota limit, GFS dynamically reduces the time between its
quota-file updates to prevent the limit from being exceeded. The normal time period between
quota synchronizations is a tunable parameter,
quota_quantum
, and can be changed using the
gfs_tool
command. By default, the time period is 60 seconds. Also, the
quota_quantum
parameter must be set on each node and each time the file system is mounted. (Changes to the
quota_quantum
parameter are not persistent across unmounts.)
You can use the
gfs_quota sync
command to synchronize the quota information from a node
to the on-disk quota file between the automatic updates performed by GFS.
Usage
Synchronizing Quota Information
gfs_quota sync -f MountPoint
MountPoint
Specifies the GFS file system to which the actions apply.
Tuning the Time Between Synchronizations
gfs_tool settune MountPoint quota_quantum Seconds
MountPoint
Specifies the GFS file system to which the actions apply.
Seconds
Specifies the new time period between regular quota-file synchronizations by GFS. Smaller
values may increase contention and slow down performance.
Examples
This example synchronizes the quota information from the node it is run on to file system
/gfs
.
gfs_quota sync -f /gfs
This example changes the default time period between regular quota-file updates to one hour
(3600 seconds) for file system
/gfs
on a single node.
Synchronizing Quotas
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